M3 GTS Dyno graph

TonyR · 16-12-2014, 01:35 AM

On Litchfields state of the art Maha

billyboysm3 · 16-12-2014, 10:51 AM

Thanks Tony, I have never understood these graphs.

So does that mean its actually got 358bhp running through the rear wheels with 447bhp in total?

Would love to go out in it one day.

still no worries · 16-12-2014, 01:15 PM

its all about hp at the wheels, but nearly 100 down from engine to wheels surprised me.

TonyR · 16-12-2014, 06:02 PM

Quote:

Originally Posted by billyboysm3

Thanks Tony, I have never understood these graphs.

So does that mean its actually got 358bhp running through the rear wheels with 447bhp in total?

Would love to go out in it one day.

Corrected power is 444 at the flywheel

Rollers measures the drag and that varies with tyre. Car had on Dunlop semi-slicks

86.2bhp loss is not 100!

TonyR · 17-12-2014, 04:51 PM

Agh. First run had dyno configured as 4wd. Results will be same except the deaf figure is higher,

Second one down in rwd so drag is right. The way the Maha calculates flywheel power is accurate regardless.

Good gains but no map yet so expect a similar or higher gain again.

Stumpy · 17-12-2014, 11:07 PM

That's a big loss in a 2WD car.
I've come from quattro's where you typically lose c100bhp through transmission being 4WD.

cslsuperfan · 18-12-2014, 12:55 AM

Quote:

Originally Posted by Stumpy

That's a big loss in a 2WD car.
I've come from quattro's where you typically lose c100bhp through transmission being 4WD.

I still wouldn't turn down a drive given a chance......

TonyR · 20-12-2014, 08:42 PM

Quote:

Originally Posted by Stumpy

That's a big loss in a 2WD car.
I've come from quattro's where you typically lose c100bhp through transmission being 4WD.

It isn't the same as a dyno dynamics.

That drag power includes a lot of things not normally measured. On the Maha the important figure is the flywheel figure. You can't compare that wheel reading to one off another dyno.

Manufacturers such as BMW use the Maha.

TonyR · 20-12-2014, 08:43 PM

Quote:

Originally Posted by cslsuperfan

I still wouldn't turn down a drive given a chance......

Even more so since SPA. Lots of tweaks going on! Intrax jumbo dampers a key addition!

TonyR · 20-12-2014, 08:45 PM

Perhaps you prefer this graph

Gtr with a power curve much like the m3

16-12-2014, 01:15 PM	#3
still no worries S4 - Getting the hang of it Join Date: May 2010 Posts: 127 Casino cash: $6333	hp its all about hp at the wheels, but nearly 100 down from engine to wheels surprised me.

17-12-2014, 11:07 PM	#6
Stumpy S5 - Full Throttle Join Date: Apr 2014 Posts: 354 Casino cash: $3883	That's a big loss in a 2WD car. I've come from quattro's where you typically lose c100bhp through transmission being 4WD. __________________ No 406. Hayward & Scott exhaust. Loving it...

16-12-2014, 10:51 AM	#2
billyboysm3 CSL Register Uber-poster! Join Date: May 2011 Posts: 3,001 Casino cash: $25206	Thanks Tony, I have never understood these graphs. So does that mean its actually got 358bhp running through the rear wheels with 447bhp in total? Would love to go out in it one day.